Embark on a journey to the most dangerous spot on the California coast and find out why it is called "Devil's Jaw"; and visit the jewel of the California missions: La Purisima Mission in Lompoc, now a state historic park.

When most people think about food access, they associate it with the presence or lack of full-service grocery stores. However, it only tells us part of the important story of what food access means in the United States. Here are 5 things you should know.

Cultural historian and co-author of the seminal, “An Architectural Guidebook to Los Angeles,” Robert Winter has died at the age of 94. His passing has left many in this vast, complicated city saddened.

Worried about that giant plastic patch the size of Texas that's floating in the Pacific Ocean? Your beverage habits might well be part of the problem.

Americans use a mind-boggling 500 million single-use straws a day, according to manufacturers, and that figure doesn't include the little straws that come packaged with juice-boxes and similar containers. Laid end to end, they'd circle the earth almost two and a half times. That's 180 billion straws used each year in the United States --- most of them used for just a few minutes and then discarded -- 34 thousand tons of plastic used once and thrown away each year.

Don't get me wrong: drinking straws are great for a number of different kinds of situations. In any situation where the person drinking can't hold a cup to her mouth steadily enough to sip, a straw can mean the difference between a pleasant drink and a ruined shirt. For small children not yet strong enough to hold a pint of beverage, for people with disabilities, or for people who are just doing other things with their hands like driving, straws can make life a lot easier.

But think about it. When's the last time a food service worker asked you if you needed a straw? For the majority of us who are able to hold a glass or cup steadily, single-use plastic straws are essentially pointless.

And yet most of us use them every day. Four or five sips and they have ended their useful life. Even when discarded properly, plastic straws' small size and light weight can mean they escape overflowing trash cans, blow off garbage trucks, or float to the surface of your local landfill. And many aren't discarded properly. either way, they often eventually end up in our storm drains, rivers and streams, eventually making their way to the Pacific.

According to the California Coastal Commission, plastic straws are among the top ten items cleaned off the state's beaches during the annual volunteer California Coastal Cleanup Day, with more than 20,000 recovered in 2013 alone.

Tens of thousands of straws recovered in one day by volunteers on California beaches means that many times that number are unrecovered, with even more bobbing up and down in the so-called Great Pacific Garbage Patch. A plastic straw washed out to sea from California can reach the Garbage Patch in about four years, and spend several years circulating in that oceanic vortex. Most straws these days are made of polypropylene, which is lighter than water. That means your drinking straw will float atop the waves, slowly being broken down by sunlight and wave action into smaller and smaller pieces of plastic that eventually end up as an unnatural, unnecessary addition to the marine food chain.

Those single-use deals aren't even necessary for those of us who need to use a drinking straw. An increasing number of companies offer durable, multiple use drinking straws made of glass, metal, or plastic. They're easy to find online.

You can also find compostable drinking straws made of paper or special plastic. They're somewhat better for the environment than the typical single-use polypropylene straw, but they're still an arguably unnecessary single-use, disposable item. And the compostability only really makes a difference if you make sure they're disposed of in a compost pile: in a modern anaerobic landfill, they'll just sit there not composting.

It's worth mentioning that because they're made of polypropylene, single-use plastic straws aren't accepted by most plastic recyclers, so that avenue to soothing your environmental conscience is closed as well.

Here's the problem: even if you prefer not to use plastic straws, you may not be given the choice of refusing them in a lot of eating and drinking establishments. Many restaurants, especially those of the fast-food variety, don't give their servers much leeway in beverage presentation. You're likely to find a single-use plastic straw stuck into your drink, even if it's in a reusable cup, without ever asking for one.

Restaurateurs can help by providing straws on request only, or at least making them available in those old-school dispensers rather than plunking them unsolicited into every drink.

But those restaurateurs are more likely to do so if that's what their customers want, even though using fewer straws will save them money in the long run. Which means it's up to us to remember to ask "no straw, please" with our drink orders.

Yes, it's a pain to have to remember it at first. But the sea turtles will thank you.

For ongoing environmental coverage in March 2017 and afterward, please visit our show Earth Focus, or browse Redefine for historic material.
KCET's award-winning environment news project Redefine ran from July 2012 through February 2017.

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When most people think about food access, they associate it with the presence or lack of full-service grocery stores. However, it only tells us part of the important story of what food access means in the United States. Here are 5 things you should know.